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A method and device for testing the lightning performance of a fan considering blade rotation

A test method and fan technology, applied in the high-voltage field, can solve the problems of limited reference value of test results and inability to fully simulate the lightning connection of the fan, and achieve the effect of improving the lightning connection performance and overcoming the limitations.

Active Publication Date: 2019-01-04
WUHAN UNIV +4
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the wind turbine blades are often in a rotating state when they are struck by lightning, and the process of wind turbine blades being struck by lightning is more complicated than when they are stationary. In case of lightning, the test has limitations, and the reference value of the test results is limited

Method used

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  • A method and device for testing the lightning performance of a fan considering blade rotation
  • A method and device for testing the lightning performance of a fan considering blade rotation
  • A method and device for testing the lightning performance of a fan considering blade rotation

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Embodiment

[0043] 1. The present invention provides a wind turbine blade lightning-termination performance test device considering blade rotation, such as figure 1 As shown in the figure, 1 is the impulse voltage generator, 2 is the voltage divider, 3 is the arc electrode, 4 is the fan model, 5 is the camera, and 6 is the oscilloscope. 7 is a motor platform, 8 is a belt, 9 is an asynchronous motor, 10 is a three-phase shielded wire, 11 is a frequency converter, 12 is a metal shielding box, 13 is a surge protector, 14 is an air switch, and 15 is a three-phase power supply. The length of the discharge gap is not less than 1m, the angle of the arc electrode is 140°, the electrode radius is equal to the sum of the length of the blade and the length of the gap, the edge is set with a reverse curved surface, the angle of the reverse curved surface is 100°, and the radius is 0.5m. The fan model 4 is placed directly below the arc-shaped electrode 3, and the fan tower is grounded. The three-phase ...

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Abstract

The invention discloses a fan receiving-lightning performance test method and device capable of considering blade rotation. The method comprises a static blade receiving-lightning performance test step and a rotary blade receiving-lightning performance test step, and the method can be used for carrying out comprehensive test on receiving-lightning performance of a fan blade. The fan receiving-lightning performance test method has the advantages of overcoming the limitation that only a static state of the blade is considered in a current blade thunder receiving-lightning performance test, simulating a receiving-lightning state of the blade under a practical fan operation condition more accurately, and achieving a reference value for improving the receiving-lightning performance of practical wind generation set lightning protection.

Description

technical field [0001] The invention relates to the field of high-voltage technology, in particular to a method and device for testing lightning-termination performance of a fan considering blade rotation. Background technique [0002] Since the beginning of the new century, the proportion of new energy technology in the field of power generation has been increasing. As an important part of new energy power generation, wind power has developed at an astonishing speed. The installed capacity of wind turbines has continued to increase. The size of wind turbines Continuously increasing, the length of fan blades has increased to 80m, or even longer. [0003] The blade size of wind turbines has increased, which greatly increases the probability of wind turbines being struck by lightning. According to relevant statistics, in more than 95% of wind turbine lightning strike accidents, the lightning strike part is on the blade of the wind turbine, and the accident rate of wind turbin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D17/00F03D80/30
CPCY02E10/72
Inventor 文习山雷为民屈路苏长江王羽李明姒天军张文煜徐剑伟邢晨
Owner WUHAN UNIV
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